AL-GHANIYY-The Self-Sufficient The Wealthy

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The One who is without need of anything. He is the One who is completely independent and the whole creation depends on His wealth. He is in no need of any help or aid of anything or anyone, yet all are in need of Him.
Allah, Exalted be He, says, “Glory be to Him! He is self-sufficient.” (Surat Yoonus, 10:68).
Allah is not in need of any of His creation. He does not stand in need of anyone at all, while His creation is in need of Him.

The One who is self-sufficient. The One without need of anything. The One who transcends all needs.

The One who is completely satisfied. The One who is free from any wants. The One who is free from any dependence.

 The One who flourishes without help or aid of any sort, yet who is needed by all. The One upon whose wealth and riches all others depend.
 

From the root gh-n-y which has the following classical Arabic connotations:

to be free from wants or needs
to be self-sufficient, independent
to be able to do without help from others
to be content, satisfied
to be rich, wealthy, flourishing

This name is used in the Qur’ān. For example, see 6:133

Ghanī denotes the One whose essential nature is independence, self-sufficiency and supreme wealth.

Mughnī is from this same gh-n-y root and denotes specific deeds done by the One in bestowing wealth.